Hi Mike and Uwe,
Thank you for your answers. It is clear, now.
Regards,
Aurélien
On 10.10.2014 12:32, Uwe Schindler wrote:
Hi,
every segment is executed on its own (every segment is its own index).
Every segment returns its own document ids and the result is the union
of them ranked by score
Hi,
every segment is executed on its own (every segment is its own index). Every
segment returns its own document ids and the result is the union of them ranked
by score using a PriorityQueue. There is no cross-segment term dictionary and
posting lists in Lucene. It was like that before Lucene
By intersection, do you mean a MUST clause on a BooleanQuery?
Lucene uses "doc at a time" scoring, so for BooleanQuery, all MUST'd
clauses are visiting the same doc (if they match) at a time, so we do
the intersection for that document all at once, within each segment,
across the N clauses.
Mike
